//
// Created by Administrator on 2022/12/6.
//

#include <iostream>
using namespace std;


int main()
{
    char a = 'a';
    char b = 'b';
    char t;
    printf("a: %c, b: %c\n",a,b);
    t=a;
    a=b;
    b=t;
    printf("a: %c, b: %c",a,b);
    return 0;
}